MAINTENANCE RATIO
\mˈe͡ɪntənəns ɹˈe͡ɪʃɪˌə͡ʊ], \mˈeɪntənəns ɹˈeɪʃɪˌəʊ], \m_ˈeɪ_n_t_ə_n_ə_n_s ɹ_ˈeɪ_ʃ_ɪ__ˌəʊ]\
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Total required maintenance manpower for system support quantified. Calculated as [cumulative direct labor man-hours posted during a given period] divided by [cumulative end item operating hours during the same period]. Scope includes all maintenance actions regardless of system availability impacts, and excludes man-hours spent doing daily operation-checks or repairing and replacing components.
By Henry Campbell Black
